Method, device, equipment and system for generating DHCP (Dynamic Host Configuration Protocol) Snooping binding table

A binding table, IP address technology, applied in the field of communication, can solve problems such as user traffic loss

CN102413044AActive Publication Date: 2012-04-11HUAWEI TECH CO LTD

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Patent Information

Authority / Receiving Office: CN · China
Current Assignee / Owner: HUAWEI TECH CO LTD
Publication Date: 2012-04-11

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Abstract

The embodiment of the invention provides a method, device, equipment and system for generating a dynamic host configuration protocol (DHCP) Snooping binding table. The method comprises the steps of: structuring a request message used for acquiring DHCP user information, and sending the request message to a DHCP server; receiving a response message, corresponding to the request message, of the DHCP server, and extracting the user information in the response message, wherein the user information comprises a user internet protocol (IP) address and a media access control (MAC) address; and acquiring a user virtual local area network (VLAN) number and input port number according to the MAC address to further generate the DHCP Snooping binding table. By adopting the technical scheme provided by the embodiment of the invention, the DHCP binding table can be generated for a user with established connection with the DHCP server before DHCP Snooping is started, and the problem of flow loss of a part of users due to DHCP Snooping binding table deficiency of the part of users in a DHCP Snooping starting process can be solved.

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Description

technical field

[0001] Embodiments of the present invention relate to the field of communication technologies, and in particular to a method, system and device for generating a Dynamic Host Configuration Protocol Snooping (DHCP Snooping) binding table. Background technique

[0002] Dynamic Host Configuration Protocol (DHCP) snooping (Snooping) technology is a security feature of DHCP. By monitoring the DHCP messages between DHCP users and DHCP servers, the DHCP Snooping binding table is established and maintained. When using the binding table, the address resolution protocol (Address Resolution Protocol, ARP) message and the Internet Protocol (Internet Protocol, IP) message are checked, and the illegal message is filtered to realize the network security function. The DHCP Snooping binding table includes user Internet Protocol (Internet Protocol, IP) address, Media Access Control (Media Access Control, MAC) address, ingress port number, virtual local area network (Virtual LAN...

Claims

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